Nut-lock.



0. c. SPARKS.

NUT LOCK.

APPLICATION FILED JULY 30. 19l3.

Patented June 8, 1915 v Zlwueutoz inseam.

sense 0. erases, or ZZL'WOGD, moraine revenue-24.

Application filed July 30, 1913. Serial lilo/732,033.

To all whom it may concern Be it known that 1, 05cm G. SPARKS, a citizenof the United States, residing at Elwood, in the county of \Vill andState of Indiana, have invented certain new and useful Improvements inNut-Locks, of which. the'followingjsa specification.

This invention relates to nut locks and has for its primary obiect toprovide a nut which will be positively retained in a predeterminedposition on the bolt, especially adapting the same for use on railwaysor the like, where the nut is very often'accidentally displaced due tovibration or similar causes.

Another object which this invention contemplates is the production of anot lock,

comprising an auxiliary nut arranged on the bolt subjacent the nutproper, the ar- -rengeinent being of such apeculiar formation as toinsure a double retaining action between the'two nuts for positivelyretain-f ing the same in the desired position.

Other objects aswell as the nature, characteristic features and scope ofmy invention will be more readily understood from the followingdescription taken in connection with the accompanying drawings andpointed out in the claim forniinga part of this specification.

Referring to the draw1ngs.:--F1gure 1 s v an elevation of the deviceconstructed in ac-- cordance w th'my invent1on;.F1g. 2 IS a sec- 1tional view taken on the line 2-2 of Fig. 1; Fig. 3 is a detailperspective view of the auxiliary nut; and Fig. 4 is a plan view of theinner face of the nut proper.

In the drawings wherein is illustrated the preferred form of thisinvention a bolt 5 is provided which is of the ordinary form,

having a screw threaded. shank 6" and a head 7-.

Engaged in screw threaded relation with the threaded shank dot the bolt,is the auxiliary nut 8 which comprises a conical sleeve 9 having athreaded bore 10, and an annular formed thereon aspherical head'12,thereby providing a locking finger, the function of which will be morefully hereinafter described. 0n inferring to Fig. 3 of the drawings itwill be seen that the not 8 tapers from the flange 11.

A nut groper 13 which is provided with a threadebore is arranged inscrew thread ed relation with the shank 6 of the bolt, a

' portion'of the inner bgre of the nut being cut out, and the inner faceof thenut beveled and communicating with said out out portion; saidbeveled portion being provided With'a series of spaced aparthemispherical recesses 14, which are adapted for locking Patented s,lora engagement with the spherical head 12 of the flange 11.

In operation the auxiliary nut 8 is threaded on the shank 6 of the bolt5, to the desired point, and the nut 13 then threaded on the shank abovethe auxiliary nut, having the beveled side thereof arranged so as to beengaged by the locking finger or head 12 of the flange, and the conicalsleeve 9 engaging in the cut out portion which is provided in the boreof the nut 13. When in an operative position it is seen that the conicalsleeve 9 extends; upwardly in the. nut to r approximately tlge centerthereof, and the spherical head 1 engaging one of the recesses 14thereby providing a double retaining action between these two elementsin view of the fact that the outer periphery of the conical sleeve 9frictionally engages the cut out portion on the inner bore of tliecnut,providing frictional engagement therebetween, and the head 12 of theauxiliary nut 8 which engaged with the nut 13 as above describedprovides the second retaining means. It is of course obvious that theauxiliary nut-8 is formed of a suitable spring metal so that the samewill bind against threads of the bolt when pressure is exerted by thenut 13-, the nut 13 being readily disengaged from the auxiliary not 8,by in sorting a suitable instrument between the inner face of the nut 13and the reduced end of the flange 11 soas to disengage the head 12 fromthe recess 14:, and the nut re versely turned on the bolt so as toremove the same therefrom.

It will be understood that the above (lee, scription and-accompanyingdrawings coniprehend only the general and preferred embodiment of myinvention and that various minor changes in detail of construction, proportion and arrangement of. the parts may he made Within the scope ofthe appended claim and Without sacrificing any of the advantages of myinvention.

Having thus fully described'iny invention, What I claim as new anddesire to secure by Letters Patent is A. nut lock including, incombination "with a hole, an auxiliary nut threaded on the bolt andhaving a portion of its well removed to provide a split nut adapted forcontraction umier pressure, the outer periphery of. said nut beingsmooth end tapering rind having one of its ends enlarged to provide anannular flange, ene'of the ends of said flange being extended. andhaving e spherical eniargernent farmed on the free terminal of saiciexiended portion, and e main nut threaded en saic i bolt having its itapering inwardly tewerd the be nut and provided with recesses n sei ingportion, the-latter faeii i trance of the auxiliary nut fer e the latterto snugly engage the belt e of the extended poreion of saiii eiinii' Kengaging any of said recesses in e movement of the main nut in e COHHLGJrection.

In testimony whereof i aiiix my in presence of two Witnesses.

Witnesses E. D, HIEATT, FRANK M. PRICE.

